New archaeological discoveries continue to be made at the site of the San Jose shipwreck, 600 metres under the sea off the coast of Colombia. Described as the 'world's richest shipwreck', the Spanish galleon was sunk by the British in 1708, with hundreds of souls aboard and a heavy cargo of gold, silver and jewels from the Americas. But the ship's loot remains contested - with various nations, tribes and even a private salvage company staking a claim. 

• Guest: Ann Coats, Professor of Maritime Heritage, University of Portsmouth